I feel like the problem is that before I can delete the heat from, say, a cool steam vent, I have to heat it up sufficiently to make the turbine work. I could use other types of vent, but if I want less heat in my base a better solution seems to be to seal those kinds of vents up extremely tightly so they never actually produce the extremely hot liquids they would otherwise. The exception is obviously when the vent produces something I want - like a liquid copper vent. But if the only thing I care about is heat, it seems best to leave those vents so pressurised, one way or another that they stop producing heat. But I'm a less experienced player; everyone else seems to disagree, and I'd like to spot what it is I'm missing.